Unit 68 quiz

A manual-type HVAC system requires the operator to fully control all of the following EXCEPT:

Which of the following sub-systems does an automatic climate system NOT control?

Technician A says that to check the cooling fan operation, you may be able to use bidirectional controls on the scan tool. Technician B says a scan tool is the only tool required for testing the cooling fan. Who is correct?

The ECU sends output commands to which type of component to control fan speed, heater core coolant flow, and air-conditioning clutch activation?

Most hybrid vehicles use a _____ to drive the air-conditioning compressor.

The position of the servo motor can be reported back to the ECU by use of a:

Electric actuators have small plastic gears inside that can strip out if the mode doors get jammed or develop excessive _____ when turning.

Air doors are controlled by all of the following methods EXCEPT:

One of the first steps in checking the operation of an automatic or semiautomatic HVAC system is to research the system’s operation in the _____, which will give you a good idea of how to perform a thorough testing.

Technician A says that the benefit of a dual drive air-conditioning compressor is that it can be belt driven or driven by the high-voltage battery. Technician B says that the purpose of the dual drive is to provide two speeds of air-conditioning compressor operation. Who is correct?